Process for restoring blemished moving-picture films.



a purified quality when user STATES PATENT DFFICE.

FREDERICK W. HOCHSTETTEB, OI NEW YORK, N. Y., ASSIGNOR T0 PAUL M. PIERSON, OF SCARBORO-ON-THE-HUDSON, NEW YORK.

No Drawing.

To all whom it concern.-

Be it known that I, FREDERICK W. Hocns'rn'rrnn, a subject of the Emperor of Germany, and a resident of New York, county and State of New York, have invented a certain new and useful Process for Restoring Blemished. Moving-Picture Films, of which the following is a full, clear, and exact specification.

This invention relates to a process for treating moving picture films which have become impaired by use.

In my applications fo compositions of matter for restoring tlf pictures on films, Serial Number 732,465 Serial 'Number 770,177, andSerial Num .1- 771,689, I employ an oil, or a fatty :base mixed with one or more other ingredients to form an emulsion which is adapted to be applied on the film to restore its flexibility and for removing from the scratches and from the photography of the pictures thereon all particles of dust and foreign substances which impair the transparency of the film during its transmission through a prifecting machine.

In instances these forms of ilemishes of the film may be eilectually removed by employ; ing a single fat, or a single oil, thereby dispensing with the use of the other ingredients of the above referred to compositions of matter. These advantages are attained by utilizing a mineral oil or an animal fat, or vegetable oil, such as petro1atum,paraifin, spermaceti, beeswax, oil of petroleum, oil of turpentine, lard oil, benzin, naphtha, olive oil, cotton seed oil, oil of sweet almonds, or the like, all of which should lpreferably be of n practice when a fat is used it is preferably melted under the influence of heat to a semi-liquid state, onto a. consistency where: by the substance may be conveniently applied upon the surface of a film through the medium of a pad, brush, or other suitable means, or when an oil is employed it is similarly applied upon the surface of the film until a coatin isformed thereon.' By the employment of a buffer, or pad of any desired type the coating is subjected to sufficio'nt friction to soften the texture of the film and to force the substance into the crevices of the scratches thereof. The foreign substance collected on the film will thereby be absorbed by the cleanin'g ma Specification of Letters Patent.

BLEMISHED MOVING PICTURE FILMS.

Patented July 25, 1916.

Application filed June 20, 1913. Serial No. 774,864.

terial, and by the use of a pad of chamois skin, cloth, cotton, or other soft material all of the surplus coating is removed from the film which in turn will clear the high lights and shadows of the pictures as well as freeing the scratches in the film of all of the foreign matter. WVhen both surfaces of the films have been coated with the oily material which slightly softens the surface emulsion thereon, a portion of the oily material is removed as has been stated, thereby removing the foreign matter collected on the films. The surfaces are then rubbed and boiled to remove the final surplus oily-coating and particularly to burnish the softened emulsion thereby closing the scratches in such manner that the surfaces of the film are rcstored to their original condition. Moving picture films Which become so blemished as to be practically worthless after being used a limited'number of times may thus be restored and utilized for many exhibitions of the pictfires thereon. c

Having thus described my invention, I

claim new and desire to secure by Letters Patent v 1. The process of, restoring blemished moving picture films, which consists in coating said film with an oily material capable of softening the surface thereof; rubbing and. .bufiing the surface so treated toefirst clean and then remove the scratches there from; and then removing the oily material from the surface of the film.

2. The process of restoring blemished moving picture films which consists in coating said film with an oily material capable of softening the surface of the emulsion thereon; then removing a portion of said oily material and the foreign matter'collect-ed thereby; then rubbing and buffing the surface of the film to remove the surplus Witnesses:

B. Asnorr, M". DERMODY. 

